feat(transcription): add shared voice input support (#4232)

* feat(webui): add voice transcription input

* feat(webui): render ANSI output in code blocks

* refactor(webui): isolate voice recorder logic

* refactor(transcription): keep websocket ingress thin

* refactor(transcription): resolve channel audio settings on demand

* style(webui): neutralize voice waveform color

* feat(webui): add voice input tooltip

* feat(webui): add voice input keyboard shortcut

* fix(webui): distinguish voice shortcut platforms

* fix(webui): place voice button after model selector

* refactor(webui): share voice hold recording helpers

* fix(desktop): allow microphone voice input

* fix(webui): stabilize token usage month labels

* feat(webui): show voice input on settings overview

* fix(webui): label voice capability as recognition

* fix(webui): align capability overview status

* refactor(webui): isolate transcription socket handling

* fix(webui): soften silent voice waveform

* refactor(audio): clarify transcription service location

* docs(transcription): clarify audio and provider boundaries

* fix(exec): reduce session output polling flake

webui/src/i18n/locales/en/common.json

@@ -73,6 +73,7 @@
       "models": "Models",
       "providers": "Providers",
       "image": "Image",
+      "voice": "Voice",
       "browser": "Web",
       "cliApps": "CLI Apps",
       "mcp": "MCP",
@@ -99,7 +100,8 @@
       "capabilities": "Capabilities",
       "apps": "Apps",
       "nativeHost": "Native host",
-      "hostSafety": "App safety"
+      "hostSafety": "App safety",
+      "voiceInput": "Voice input"
     },
     "models": {
       "selectModel": "Select model",
@@ -161,7 +163,13 @@
       "engine": "Engine",
       "logs": "Logs",
       "diagnostics": "Diagnostics",
-      "contextWindow": "Context window"
+      "contextWindow": "Context window",
+      "transcription": "Transcription",
+      "transcriptionProvider": "Provider",
+      "transcriptionProviderStatus": "Provider status",
+      "transcriptionModel": "Model",
+      "transcriptionLanguage": "Language",
+      "voiceLimits": "Limits"
     },
     "help": {
       "theme": "Switch between light and dark appearance.",
@@ -200,7 +208,12 @@
       "diagnostics": "Export a small runtime report for support.",
       "localServiceAccessNative": "Allow Full Access shell commands to reach services on this Mac.",
       "webuiDefaultAccessNative": "Used by native chats without a project-specific permission.",
-      "contextWindow": "Choose the default context budget for this model configuration."
+      "contextWindow": "Choose the default context budget for this model configuration.",
+      "transcription": "Transcribe microphone input before sending it. Chat channel voice messages use the same settings.",
+      "transcriptionProvider": "Uses the matching provider credentials from Providers.",
+      "transcriptionProviderStatus": "API keys stay under providers, not in transcription settings.",
+      "transcriptionModel": "Leave as the resolved default unless your provider needs a custom model id.",
+      "transcriptionLanguage": "Optional ISO-639 hint such as en, zh, ja, or ko."
     },
     "timezone": {
       "select": "Select timezone",
@@ -391,6 +404,7 @@
       "totalProviders": "{{count}} available",
       "webSearch": "Web search",
       "imageGeneration": "Image generation",
+      "voiceInput": "Voice input",
       "workspace": "Workspace"
     },
     "usage": {
@@ -486,6 +500,11 @@
       "rawInstructions": "Raw SKILL.md",
       "rawInstructionsEmpty": "No raw instructions.",
       "detailDescription": "Details for {{name}}."
+    },
+    "voice": {
+      "selectProvider": "Select provider",
+      "configureProvider": "Configure provider",
+      "languageAuto": "Auto"
     }
   },
   "chat": {
@@ -678,6 +697,21 @@
         "deepResearch": "Deep research",
         "voice": "Voice input"
       },
+      "voice": {
+        "hint": "Click to dictate or hold",
+        "stop": "Stop recording",
+        "transcribing": "Transcribing...",
+        "recordingStatus": "Recording {{time}}"
+      },
+      "voiceErrors": {
+        "unsupported": "Voice input is not supported in this browser.",
+        "permission": "Microphone permission is required.",
+        "notConfigured": "Configure a transcription provider first.",
+        "tooLong": "Recording is too long.",
+        "tooShort": "Hold a little longer to record voice.",
+        "noInput": "No microphone input detected.",
+        "failed": "Could not transcribe audio."
+      },
       "slash": {
         "ariaLabel": "Slash commands",
         "label": "commands",